it is +名词 +doing 这种句型有吗

it is +名词 +doing 这种句型有吗 像这种形式的it is +名词+ to do /doing ,哪些名词是加to do 的,哪些是加doing 的? It is worth doing sth同义句 高中英语语法问题（急需）I think it is no use doing. I think it no use doing.哪句对?这种叫做什么?求详解 老师问一下,it is +名词+doing对吗it is +adj.+to do和+doing有什么区别? what is it doing what is it doing it is about doing how is it doing It+be+名词+doing 造句.急 it is not of importance.Q1.it is not of use.这句语法正确吗?不确定有无这种语法Q2.有的话 那USE後面接doing sth 或者是 to do sth 哪个才对?还是都可以有差吗? 有it is a waste of time doing sth 这种用法吗?如题. It is not the knowing that is difficult,but the doing.这句谚语怎么译? It is a bore .doing it is believe by..这里用believe的这种是名词?还是要用什么 It is no harm doing sth与It is not harmful doing sth可以替换吗?为什么btw:此处的harm是什么词性?名词?no可不可以改成not a harm(既然harm是名词） no use是什么词性?是名词.形容词还是什么.如果说是名词的话，我能不能说it is happiness doing sth it are raining when doing is you what连词成句